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      :: Filmscanners
Filmscanners mailing list archive (filmscanners@halftone.co.uk)

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Re: filmscanners: Canon 4000 scanner VS Nikon LS4000



What Nikon should do , to heat rid of the depth of field problem are:
Change to a new LED , better lens f stop , at least 5.6  .
They prefer a cool scan, low light, low energy ,no heat.
Imacon and other scanner manufactures prefer a more intensive light source 
and a fan  to stable the scanner heat inside. In the new Imacon they  have 
build in a thermostat  set at 20 Celsius ,
despite what conditions it is outside  in the room. The Imacon scanner lens 
works at f stop 8 .
Mr Hemmingway  at Polaroid maybe can answer what is the lens f stop in a 
ss4000 scanner.
Best regards
Mikael Risedal




>From: Julian Robinson <jrobinso@pcug.org.au>
>Reply-To: filmscanners@halftone.co.uk
>To: filmscanners@halftone.co.uk
>Subject: Re: filmscanners: Canon 4000 scanner VS Nikon LS4000
>Date: Wed, 21 Nov 2001 11:43:41 +1100
>
>
>>At 9:44 AM -0500 20-11-01, Bruce Kinch wrote:
>>>
>>>Perhaps it's worth noting that Kodak now provides "curved field"
>>>projection lenses as standard for normal (cardboard, presumably) mounted
>>>slides in their Carousel projectors, but their older "flat field" design
>>>is recommended for glass mounted transparencies.
>>
>>BF: If memory serves correctly this has been the case at least since the
>>1970's.  Curved field lenses were standard, and flat field lenses were
>>special orders.
>
>YES!  I have wondered why Nikon don't do the same thing within the range of
>their scanner Depth of Field. It would nearly double warping that could be
>tolerated before losing focus. The only downside is that you would have to
>put the film/slide in the "right way round" regarding film curve, not
>regarding mirror image sense.  This would not be a problem if documented
>clearly.
>
>Julian
>


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